CHINESE JOURNAL OF CATALYSIS
·
2023
·
IF 16.5
Chun Yin,Fulin Yang,Shuli Wang,Ligang Feng
Efficient heterogeneous catalysts play a very important role in the value-updated green hydrogen production from urea-containing wastewater. Herein, NiSe 2 /MoSe 2 heterostructured catalyst with optimized interfacial electron redistribution and urea adsorption energies via a strong built-in electric field was demonstrated effective for the urea-assisted water splitting reactions. Efficient catalytic performance was found on NiSe 2 /MoSe 2 hybrid microsphere owing to the combined merits such as the unique structure features, the strong synergetic coupling effects, the increased active sites, and the high amount of intrinsic Ni 3+ species. Excellent urea oxidation activity was found to drive 10 mA cm −2 at the potential of 1.33 V when loaded on the glassy carbon electrode, and a cell voltage of 1.47 V was required in the NiSe 2 /MoSe 2 ||Pt/C urea-water electrolyzer to drive 10 mA cm −2 , about 220 mV less than that of water electrolysis, indicating a less energy consumption technique during the electrolysis. The spectroscopic and theoretical analysis revealed the effective synergy of the Ni–Se bond and Mo–Se bond that would be promising for efficient catalyst system construction.
研究领域:
材料科学
·
能源化学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Applied Materials Today
·
2022
·
IF 8.663
Yan Zhang,Shao-Yu Yuan,Yang Zou,Tian-Tian Li,Hong Liu,Jian-Jun Wang
The inherent drawbacks of severe charge recombination and poor conductivity of hematite (α-Fe 2 O 3 ) are still the obstacles for its applications. Herein, we report the integration of NiSe 2 nanoparticles on the surface of Fe 2 O 3 films for the photoelectrochemical (PEC) water oxidation. The resulting heterostructure photoanode exhibited significantly enhanced PEC performance with a current density enlarged by 50%. The investigations on mechanism reveals that a built-in electric field was formed to accelerate the charge transfer and separation, the charge carrier concentration was significantly enhanced by the formation of oxygen vacancies induced by NiSe 2 , the lifetime of photogenerated electrons and holes were substantially prolongated due to the suppression of recombination by the surface passivation and promoted surface kinetics for water oxidation by of Se-O species. This work brings inspiration to integrate multifunctional modifiers on photoelectrodes that allows for addressing several issues simultaneously and consequently improving the PEC performance for hydrogen production via water splitting.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Jing Yu,Yumeng Tian,Zaiwen Lin,Qi Liu,Jingyuan Liu,Rongrong Chen,Hongsen Zhang,Jun Wang
Combining a variety of factors to optimize the performances of electrocatalysts has become a new breakthrough for the development of low-cost electrolytic catalysts. In this work, we constructed N-doped carbon fibers as the substrate, which could provide high electronic conductivity and large surface area for the load of active catalysts, as well as close incorporation. The nanosheets morphology of NiSe 2 /Ni 5 P 4 is conducive to enlarging the specific surface area and exposing more active sites. The electrical conductivity is improved by the selenide and carbon nano-fiber substrate. The multiple features, including the unique structure characteristics, heterostructure of NiSe 2 and Ni 5 P 4 , and high electroconductivity , endow NiSe 2 /Ni 5 P 4 with superior catalytic activity towards water splitting. As a result, the overpotentials at the cathode current density of 10 and 100 mA cm −2 upon NiSe 2 /Ni 5 P 4 nanosheets are 112 and 350 mV in 0.5 M H 2 SO 4 . For oxygen evolution reaction (OER), the overpotential of NiSe 2 /Ni 5 P 4 nanosheets at a current density of 10 mA cm −2 in alkaline electrolyte is 316 mV. Furthermore, the bifunctional NiSe 2 /Ni 5 P 4 nanosheets exhibit excellent working stability for both HER, OER and overall water splitting, showing potential application in hydrogen energy.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Muhammad Sanaullah Shah,Zhang Zhenyu,Sohail Ahmad,Wang Shuiying,Hou Hongying,Zuo Xiaoqing,Muhammad Zia Ullah Shah
The development of supercapacitor technology has advanced significantly because of the high need for efficient and sustainable energy storage solutions. This study investigates the synthesis and electrochemical performance of NiSe 2 -ZnS nanocomposites as promising electrode materials for high-performance supercapacitor. The NiSe 2 -ZnS nanocomposites were synthesized via simple chemical method, and characterized. The results showed that the NiSe 2 -ZnS composite have outstanding electrochemical behaviors, combining the superior chemical stability and thermal durability of NiSe 2 with the remarkable electrical conductivity of ZnS. The NiSe 2 -ZnS hybrid electrode demonstrated remarkable electrochemical behavior, delivering a specific capacitance of 810 F g -1 in a three-electrode system and 87.3 F g -1 when evaluated in a two-electrode configuration. It also demonstrated a notable ED of 27.2 Wh/kg and a high PD of 3744.7 W/kg. Notably, the electrode retained 96.7% of its original capacitance even after 5000 continuous charge-discharge cycles conducted under a current load of 15 A g -1 , demonstrating excellent cycling durability. This research shows that NiSe 2 -ZnS nanocomposites is a good-performance, low-cost, and sustainable material for next-generation supercapacitors.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米科技
·
功能材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Jingyi Wang,Shatila Sarwar,Jun Song,Lijun Du,Tianbao Li,Yaodong Zhang,Baobi Li,Qingping Guo,Jujie Luo,Xinyu Zhang
The work reports the fabrication of CoSe 2 @NiSe 2 nanoflowers on nickel foam substrates via one-step microwave method, in which the Ni foam serves as a skeleton and a nickel source. The as-prepared CoSe 2 @NiSe 2 nanoflowers display high capacitance value of 1434 F g −1 at the current density of 1 A g −1 and excellent cycling performance of 87.5% retention after 20,000 cycles at 10 A g −1 . In addition, the supercapacitor device using CoSe 2 @NiSe 2 nanoflowers as the positive electrode and activated carbon (AC) as the negative electrode not only can exhibit wide voltage window of 1.6 V, but also deliver a maximum high energy density of 20.4 Wh Kg −1 at power density of 798 W Kg −1 and 86.6% of capacity retention after 20,000 cycles.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Xue Zhang,Zhiwei Cheng,Puhui Deng,Linping Zhang,Yu Hou
A designed type-II heterojunction photocatalyst , NiSe 2 /Cd 0.5 Zn 0.5 S (NiSe 2 /CZS), was successfully synthesized and it exhibits outstanding photocatalytic hydrogen evolution performance. The optimal loading amount of NiSe 2 on Cd 0.5 Zn 0.5 S is 13 wt %, and the corresponding hydrogen production rate is approximately 121.01 mmol g −1 h −1 under visible light. The heterojunction structure between Cd 0.5 Zn 0.5 S and NiSe 2 promoted the separation of photogenerated electron-hole pairs, effectively suppressed the photogenerated carrier recombination and endowed the material with excellent interfacial charge transfer properties, thus improving the photocatalytic performance.
研究领域:
材料科学
·
化学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2021
·
IF 6.583
Shang Wu,Sheng Zhou,Qiaoliang Feng,Huanlei Zhao,Xin Xu,Tao Cui,Hong Zhang,Xia Wang,Quanlu Yang
Tin metal was widely used in energy storage and photovoltaic devices due to its high stability and high conductivity. However, due to its low electrochemical performance, the application of tin compounds in supercapacitors was rarely reported. In this paper, it was first used a simple two-step hydrothermal method to design a nanospherical NiSe 2 /SnSe 2 composite as supercapacitor electrode materials. The composite exhibited excellent electrochemical properties, it not only increased conductivity and provided more active sites, but also shortened electron and ion transport paths. The (Ni, Sn)Se 2 -2.5 exhibited an appealing specific capacity (116 mA h g −1 at 1 A g −1 ) and better cycle stability (80% capacity retention after 4000 cycles). Moreover, asymmetric supercapacitors which were assembled with (Ni, Sn)Se 2 -2.5 and activated carbon had superior electrochemical performance. When the specific power was 855 W kg −1 , the specific energy can reached 34.2 Wh Kg −1 and accompanied by an efficient stability (82.3% of capacity retention after 10000 cycles). Therefore, the synthesized spherical (Ni, Sn)Se 2 -2.5 possessed excellent prospects as electrode materials for supercapacitors.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
He Zhou,Dezhi Kong,Ningning Chu,Hui Wang,Jie Xu,Ye Wang,Tingting Xu
The development of sustainable energy technologies relies on the exploitation of efficient and durable electrocatalysts for water splitting at high current densities. Our work presents a novel bifunctional catalyst, denoted as NM@NC/CC, which combines the benefits of NiSe 2 -MoSe 2 heterojunctions with nitrogen-enriched porous carbon derived from metal-organic frameworks (MOFs). The integration of these components is designed to harness their combined advantages, which include enhanced electron transfer, improved mass and gas evolution dynamics, and an increased number of catalytically active sites. These features collectively optimize the energetics for both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). As a result, the catalyst facilitates rapid kinetics for the overall water-splitting process. The NM@NC/CC demonstrates low overpotentials, requiring only 91 mV for the HER and 280 mV for the OER to reach a current density of 10 mA cm −2 . Even at higher current densities of 100 mA cm −2 for HER and 50 mA cm −2 for OER, the overpotentials are only 159 mV and 350 mV, respectively. Additionally, a two-electrode setup using this catalyst achieves a current density of 10 mA cm −2 with a minimal cell voltage of 1.56 V. The insights gained from this study will contribute to the advancement of electrocatalysts for energy conversion technologies.
研究领域:
材料科学
·
能源转换技术
·
电催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Changyi Xu,Guimei Li,Wanchun Huang,Xiangyun Luo,Mengmeng Wei,Huan Wen,Yejin Li,Xiaokun Li,Youlin Zhang,Wei Chen
Developing low-cost, highly efficient and stable bifunctional electrocatalysts for overall water splitting is vital but still a challenge. Hetero-atom doping is an effective strategy to improve the catalytic activity of electrocatalysts by increasing active sites and regulating electronic structure. Here, Mo-doped NiSe 2 nanosheets were in situ grown on nickel foam (NF) by hydrothermal and the subsequent selenization process as bifunctional electrocatalysts for overall water splitting. Incorporation of Mo into NiSe 2 can regulate the electronic structure, increase the numbers of high-valence Ni 3+ and active sites, generate the disorder defects due to the formation of active material NiOOH, and decrease the charge transfer resistance. The above synergistic roles make the Mo-doped NiSe 2 to present superior catalytic performances and remarkable stability for the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). Under alkaline condition, the overpotentials of OER and HER are 210 mV and 172 mV at a current density of 10 mA cm –2 , respectively. Moreover, only a low cell voltage of 1.57 V is required to reach a current density of 10 mA cm –2 in a water splitting device assembled with the Mo-doped NiSe 2 as the anode and cathode. Therefore, this study opens up a new way for designing non-precious bifunctional electrocatalysts by Mo doping.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2019
·
IF 7.467
Yun Gu,Le-Qing Fan,Jian-Ling Huang,Cheng-Long Geng,Jian-Ming Lin,Miao-Liang Huang,Yun-Fang Huang,Ji-Huai Wu
This work reports the preparation of N-doped reduced graphene oxide decorated NiSe 2 nanoparticles (N-rGO/NiSe 2 ) in the presence of different amount of graphene oxide reactant by a simple two-step process, which contains hydrothermal preparation of Ni(OH) 2 precursor and then solvothermal synthesis of N-rGO/NiSe 2 composites with different content of N-rGO. The as-prepared N-rGO/NiSe 2 composites is characterized by power X-ray diffraction, Raman spectroscopy , high-resolution X-ray photoelectron spectroscopy, field emission scanning electron microscopy , transmission electron microscopy, energy-dispersive X-ray spectroscopy and N 2 adsorption–desorption isotherm. The results show that N-rGO acts as supporter of NiSe 2 nanoparticles to prevent them from aggregation, leading to the increase in specific surface area and electrical conductivity of material. The optimized N-rGO/NiSe 2 composite can deliver high specific capacitance of 2451.4 F g −1 at a current density of 1 A g −1 . Using activated carbon (AC) as negative electrode and the optimized N-rGO/NiSe 2 composite as positive electrode , an asymmetric supercapacitor is constructed. This fabricated asymmetric supercapacitor can work stably under the potential window of 0–1.6 V, and presents the maximum energy density of 40.5 Wh kg −1 at a power density of 841.5 W kg −1 . Moreover, the N-rGO/NiSe 2 //AC asymmetric supercapacitor exhibits good cyclic stability.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Jie Xu,Cuili Xiang,Sensen Yu,Yongjin Zou,Songwen Fang,Zhicong Hu,Fen Xu,Lixian Sun
Transition-metal selenide materials have the potential to be excellent power storage materials owing to their unique physical and structural features. The porous yolk-shelled NiMnSe3 nanospheres synthesized by a two-step hydrothermal and thermal treatment process were used as anode electrode materials for an asymmetric supercapacitor (ASC). The unique yolk-shelled structure and the bimetallic synergistic effect contributed to the improved charge transfer capability of the ASC. With density functional theory calculations, the NiSe2–MnSe heterojunctions illustrate the synergy between NiSe2 and MnSe components along with the charge transfer path at the heterogeneous interface. The NiMnSe3 electrode material has excellent electrochemical properties in the three-electrode system (1093 F g–1 at 0.5 A g–1). The ASC using the NiMnSe3 anode with an activated carbon cathode exhibited a maximum energy density of 74.5 Wh kg–1 and a maximum power density of 8259.3 W kg–1, retaining 99.5% of the initial capacitance after 12,000 cycles. This shows that metal selenide heterojunctions have promising potential for supercapacitor as ASCs.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Muhammad Sana Ullah Shah,Xiaoqing Zuo,A. Shah,Sameerah I. Al-Saeedi,Muhammad Zia Ullah Shah,Eman A. Alabbad,Hongying Hou,Syed Awais Ahmad,Muhammad Arif,Muhammad Sajjad,Tauseef Ul Haq
This work proposed a facile synthesis of NiSe 2 -CoSe nanocomposite via an economical wet-chemical assisted method for the electrochemical energy storage domain, specifically for supercapacitor applications. The morphological, structural, and surface chemistry characterization guarantee the appropriate formation of the micro flower and nanoparticles-like morphology with high purity, crystallinity , and the existence of Ni, Co, and Se elements on the surface of the samples was verified by EDX examination. The comparative electrochemical properties reveal that the NiSe 2 -CoSe nanocomposite electrode yields an optimized performance than NiSe 2 and CoSe electrodes in an aqueous solution with improved capacitance and charge transport kinetics. The synergistic effect between metal selenide nanomaterials could effectively realize the excellent charge storage properties of the NiSe 2 -CoSe nanocomposite. Strikingly, a voltage runs to 1.7 V by assembling a hybrid supercapacitor of NiSe 2 -CoSe||AC||KOH in the two-electrode mode for utilization towards the practical aspect. More specifically, high stability of 89.6 % was sustained at 20 A/g for 20,000 cyclings with durable performance. Additionally, a high power of 8460 W/kg was achieved when the energy density progressively reached 54.9 Wh/kg. The use of chalcogenide is now the top priority for electrochemical energy conversion and storage , thanks to these encouraging results.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）